package com.tang.fitten_cod;

import java.util.ArrayList;
import java.util.LinkedHashSet;
import java.util.Set;

/**
 * @author tmh
 * @date 2024/4/4 19:15
 * @description
 */
public class code1 {
    public static void main(String[] args) {
        Set<String> set=new LinkedHashSet<>();
        System.out.println(set.add("1"));
        System.out.println(set.add("1"));
        Exception exception=new Exception();
    }
}
